6655 Series On-Surface Temperature Sensors DESCRIPTION Tight interchangeability eliminates or reduces customer need The 6655 Series On-Surface Temperature Sensors are lower- for calibration. Enhanced accuracy and response time are cost, thermistor-based temperature sensors that use designed to meet your needs. A wide operating temperature Honeywells compact, low-profile, 12,70 mm 0.5 in thermostat range of -20 C to 110 C -4 F to 230 F allows application package. flexibility. This series is designed to offer temperature measurements The 6655 Series products have gained widespread acceptance with enhanced response and accuracy on most flat surfaces standard due to their robust design and ease of installation. A and pipes in non-condensing applications. variety of mounting brackets provides mounting flexibility. Unlike thermostats, which are generally limited to one fixed temperature, these thermistor-based NTC (Negative Temperature Coefficient) devices allow the customer greater flexibility in temperature monitoring and controlling. FEATURES POTENTIAL APPLICATIONS Air/surface temperature sensing Water heaters and boilers NTC thermistor output Industrial ovens and ranges Low cost Copier diffuser rollers Low, compact profile HVAC compressor or duct temperature sensing Tight interchangeability Enhanced accuracy Enhanced response time Wide operating temperature range Variety of mounting brackets Widely used sensor package footprint Enhanced stability/low drift 6655 Series Table 1. General Specifications Parameter Characteristic Temperature sensing type air/surface Thermistor type NTC Nominal resistance at 25 C 77 F 10,000 Ohm, 12,000 Ohm Operating temperature range -20 C to 110 C -4 F to 230 F Tolerance 2.5%, 7.6%, 10.0% BETA (25/85) 3694, 3976 R-T curve 12, 16 Time constant on metal surface 1.5 s Dissipation constant on metal surface 6.5 m/WC Housing material phenolic Mounting method/mechanical interface (see Figure 1) Electrical interface/connector type (see Figure 1) Figure 1. Mounting Dimensions (For reference only: mm/ in . 6655---90030004, 6655RP-0030007 6655---90980004, 6655---90980006 No bracket, quick connect terminal, (90, 0.25 in) Bracket (movable surface), quick connect terminal (90, 0.25 in) 6655---91000001 6655---94280004 Bracket (movable surface), quick connect terminal (0, 0.25 in) Bracket (movable surface), quick connect terminal (45, 0.25 in) 2 www.honeywell.com/sensing